Would either of these be of any help? MEDIA_UNMOUNT_DELAY To specify a Media unmount delay property indicates that the unloading of media is delayed after the requested operation is complete. Media unmount delay applies only to user operations, to include backups and restores of database agent clients, such as those running NetBackup for Oracle. The delay reduces unnecessary media unmounts and the positioning of media in cases where the media is requested again a short time later. The delay can range from 0 seconds to 1800 seconds. The default is 180 seconds. If you specify 0, the media unmount occurs immediately upon completion of the requested operation. Values greater than 1800 are set to 1800.
RB_MPX_GROUP_UNLOAD_DELAY The RB_MPX_GROUP_UNLOAD_DELAY parameter indicates the number of seconds that nbrb waits for a new job to appear before a tape is unloaded. (Default: 10 seconds.) RB_MPX_GROUP_UNLOAD_DELAY=10 This setting can help avoid unnecessary reloading of tapes and applies to all backup jobs. During user backups, nbrb uses the maximum value of RB_MPX_GROUP_UNLOAD_DELAY and the Media mount timeout host property setting when nbrb unmounts the tape. During restores, Media mount timeout is used, not RB_MPX_GROUP_UNLOAD_DELAY. Many regards, Pat Whelan Principal Remote Product Specialist - NBU Business Critical Services Symantec Corporation www.symantec.com Mobile: +44(0) 771 492 3085 (Preferred) Office: +44(0) 118 943 6715 Email: patrick_whe...@symantec.com -----Original Message----- From: veritas-bu-boun...@mailman.eng.auburn.edu [mailto:veritas-bu-boun...@mailman.eng.auburn.edu] On Behalf Of David Stanaway Sent: 05 December 2013 10:28 To: veritas-bu@mailman.eng.auburn.edu Subject: [Veritas-bu] Queued duplication jobs churning - tape mounts increasing We had some recent hardware issues with tape robot and had to re-do robotics config on NBU. Meanwhile we had storage unit marked as inactive for the SLPs using that robot for a duplication stage. Now that the storage unit has been marked as active we have about 300 queued duplication jobs and it looks like after each image copy in the active duplication job finishes the job gets superseded by another backup job which unmounts the tape and remounts it then does 1 image. This is making duplication performance really bad and the tape mounts for the active media are going through the roof. They go from 0 to about 400 before media fills up. We didn't have this issue before the robotics reconfig I don't think. Scratching my head on this one. It may go back to a change in behavior after an upgrade from 7.1.0.3 to 7.5.0.4 also Info on the storage unit config. Dell ML6010 with 2 LTO4 drives presented to 2 media servers There is a 2 host SUG with the 2 drives. The target media group has max non-full media set to 2 At any time, I am seeing 4 active duplication jobs oscillating with no drive available with normally only 1 active at any given time due to unmount/remount overhead. Obviously only 2 can actually be writing to media at any given time. I tried taking one of the hosts out of the SUG, but that didn't help, still have 4 active jobs juking it out for the 2 drives and thrashing the robot and media mounts. Anyone have a suggestion? This is killing the robot and lifecycle policy windows. _______________________________________________ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu _______________________________________________ Veritas-bu maillist - Veritas-bu@mailman.eng.auburn.edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu